henchoz



(Modem- A. & F. HENGHOZ.

STOP WATCH.

No. 892,729. Patented Nov. 13, 1888.

I K 2 1f i m, J I

UNITED STATES Parent @rrren.

AUGUSTE HENOHOZ AND FRITZ HENCHOZ, OF LOCLE, S" ITZERLAI\ D.

STGP WATCH.

SPECIFICATION forming part of Letters Patent No. $5 2,729, dated Elevenfser Application filed March 16, 1853. Serial No. 267,427. (hiodeh) Patented in England June 20,1887, No. 8,843; in Italy August 18, 1887; No. 21,94'I 2U6, and in France November 2, 1SS7,No.18-l;277.

To all whom it may concern.-

Be it known that we, AUGUSTE Emotion and FRITZ HENOHOZ, both residing at Locle, in Switzerland, have invented a new and useful Improvement in StopW'atches, of which the following is a specification.

This invention consists in a stop mechanism of a very cheap construction, in which the hand of the stop mechanism is directly acted upon by a wheel fixed to the axis of the seconds-wheel of the train without any intermediate transmission.

The accompanying drawings show a stop mechanism constructed according to this in vention.

Figure 1. is a top view of the general arrangement of the stop mechanism; and Fig. 2shows, on an exaggerated scale, the section of the pinion of the first wheel (center wheel) of the works, with the axis ofthe stop-hand traversing the same.

The push-piece which acts upon the camratchet G and the corresponding spring are not shown in the drawings, being of the usual construction. Upon the axis A of the secondswheel there is fixed a'fine toothed wheel, 13, which turns continuously with the axis A. The arbor of the pinion O and center or first wheel is hollow, and within it is the axis D, the pivot d of which passes through a little tube or plug, 0, inserted into the tubular arbor O, and this axis D carries the hand E of the stop mechanism. The axis D also carries a fine-toothed pinion, H, and an eccentric or heart-cam, I, the latter being acted upon by a lever, J, when the hand E is to be returned to its normal position of rest. This lever J is acted upon, as usual, by the cam-ratchet G. The other end of the axis D to the hand is provided with a pivot, d, turning in the oscillating bridge F. This latter oscillates about a screw, f, and has a projection, 1*",which bears alternately upon a cam or in a notch of the cam-ratchet G. According to the position assnmed by the bridge F the pinion H is brought into or thrown out of gear with the wheel B that is to say, that the stop-hand E is put into action or stopped by slightly moving the oscillating bridge F.

A spring, M, presses the bridge F in the direction of the wheel B, and thereby causes the pinion H to be put into gear with the wheel B as soon as the projection F falls into one of the notches of the cam G.

A friction spring, K, bears continually against the axis D and acts like a brake when the pinion H is out of gear. Fig. 2 shows the axis D in position for the hand to be rotated.

We are aware that in Stopwatches the axis D of the stop-hand has passed through the tubular arbor of the center or first wheel and has been fitted so as to oscillate within said arbor, and we are aware that rotation has been given to the arbor of the stop-hand by a wheel upon the arbor oi" the third wheel acting through an intermediate wheel or pinion. In our improvement the intermediate gearwheel is dispensed with, and the axis D is supported by and moves with the bridge F, and said bridge becomes a lever that swings upon the pivot f, and it is not necessary to slot or elongate the hole for the pivot of the axis D, as has heretofore been usual when the axis was moved laterally to connect or disconnect the gear-wheels driving the independent secondshand.

We claim as our invention- 1. The combinatiomwith the center pinion, G, having atubular arbor,of the wheel B upon the arbor of the seeondswheel of the watch movement, the axis D, passing through the tubular arbor, the hand E, pinion H, and heart-cam I upon the axis D, and the lever bridge F, pivoted at f and having a hole for the pivot of the axis D, and the cam ratchet wheel G, for giving motion to thelever-bridge and moving the axis and pinion laterally for stopping and starting the seconds-hand, substantially as specified.

2. In a stop-watch, the combination, with the wheel 13 and cam ratchet-wheel G, of the lever-bridge F, the axis D, having its pivot in a hole in the lever-bridge, the heart-cam l, pinion H, and hand E upon the axis D, and a spring acting to press the bridge and pinion H toward the wheel 13, substantially as set forth.

AUGUSTE HENCHOZ. FRITZ HENCHOZ. *Htnesses:

F. BiioHEL, 0. Genes. 

